Tonight, Pierre Thomas and producer Ted Gerstein will have an inside look at the investigation into the disappearance of Lindsey Baum, a 10-year-old girl from the small town of McCleary, Wash., missing since June 26, 2009. We were given intimate access to some of the cutting-edge techniques used by local police and the FBI, which has now joined the case. They include extensive interviewing — two-third's of the townspeople — sex offender database scrubs, the use of profilers, review of surveillance footage, and the creation of a massive command post — all used to build a timeline of the day the child disappeared. Lindsey's mother, Melissa Baum, is convinced her daughter was kidnapped and believes she is alive. Work by authorities has identified twelve persons of the interest — in and out of McCleary — with two of them of high interest. Click HERE for the full ABCNews.com write-up. ———————- UPDATE: Here is the segment from last night, "Without a Trace." It is a story we will continue to follow closely.